There are 2 alpha receptor:
- alpha 1 receptor
- alpha 2 receptor
Alpha 2 receptor:
- presynaptic receptors
- inhibitory receptors
- when stimulated; the end result will be inhibition of neurotransmition
Alpha 1 receptor:
- postsynaptic receptor
- stimulatory receptor
- stimulation will lead to stimulation; if in the blood vessels may lead to vasoconstriction
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